US3829545A - Process for manufacturing polyethylene terephthalate plastic coated wire - Google Patents

Process for manufacturing polyethylene terephthalate plastic coated wire Download PDF

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Publication number
US3829545A
US3829545A US00336799A US33679973A US3829545A US 3829545 A US3829545 A US 3829545A US 00336799 A US00336799 A US 00336799A US 33679973 A US33679973 A US 33679973A US 3829545 A US3829545 A US 3829545A
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US
United States
Prior art keywords
wire
coated
plastic
polyethylene terephthalate
coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00336799A
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English (en)
Inventor
Roger Van Vlaenderen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bekaert NV SA
Original Assignee
Bekaert NV SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL7001315A priority Critical patent/NL7001315A/xx
Priority to BE761408A priority patent/BE761408A/nl
Priority to CA103,295A priority patent/CA956426A/en
Priority to SE00708/71A priority patent/SE368170B/xx
Priority to FR7102230A priority patent/FR2077389B1/fr
Priority to LU62500D priority patent/LU62500A1/xx
Priority to AT72271*#A priority patent/AT326899B/de
Priority to DK37171A priority patent/DK146236C/da
Priority to CH131871A priority patent/CH530261A/fr
Priority to DE2104271A priority patent/DE2104271C3/de
Priority to BR000701/71A priority patent/BR7100701D0/pt
Priority to GB2065771A priority patent/GB1322114A/en
Application filed by Bekaert NV SA filed Critical Bekaert NV SA
Priority to US00336799A priority patent/US3829545A/en
Application granted granted Critical
Publication of US3829545A publication Critical patent/US3829545A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/65—Processes of preheating prior to molding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/298—Physical dimension

Definitions

  • ABSTRACT An improved process for manufacturing plastic coated wire is taught which comprises heating the wire to be coated to an elevated temperature, passing the heated wire through an extrusion zone maintained at an elevated temperature and pressure in which a polyester plastic in molten condition is coated on the heated wire, and cooling the plastic coated wire at a rate sufficient to maintain the plastic primarily in the amorphous state.
  • a steel wire is coated with polyethylene terephthalate in which the coating is at least 80 percent amorphous and 0.1 to 0.3 mm in thickness.
  • An improved wire product is produced which may be advantageously utilized for the manufacture of barbed wire, wire mesh, wire netting, wire fences and the like.
  • the present invention relates to an improved process for the manufacture of plastic coated wire as well as an improved plastic coated wire and products manufactured from it. More particularly, the present invention relates to a process for the manufacture of steel wire coated by extrusion with polyethylene terephthalate as well as the polyethylene terephthalate coated steel wire and products manufactured from it.
  • Galvanized metal coatings for example, are expensive and are only temporarily corrosion resistant.
  • a wide variety of plastic coatings for wires have been utilized but none of these have proven completely satisfactory.
  • a'polyvinyl chloride coating applied by extrusion has been employed.
  • this type of plastic coating is generally sufficiently flexible to be utilized with wire, it is not sufficiently hard to undergo the mechanical processes in wire product manufacturing machines unless it is thicker than about 0.3 to 0.4 mm. The consequence is that the polyvinyl chloride coatings applied up to now have always been thicker than about 0.3 to 0.4 mm, thereby considerably increasing the cost of the coated wire product.
  • the adhesion of the polyvinyl chloride coating is not completely satisfactory, thus causing difficulties during the processing of wire in wire product manufacturing machines; e.g. the shifting of the coating over the wire.
  • a priming or ground layer of material may be laid down on the wire before the polyvinyl chloride is applied to thereby provide a greater adhesion between the wire and the polyvinyl chloride coating. While this has partially solved theadhesion problem it has increased the manufacturing cost of the coated wire product and furthermore has not avoided the problem of the need to utilize relatively thick polyvinyl chloride coatings.
  • a wire may be passed through a vessel containing a plastic liquid synthetic material'and drained through a nozzle in the bottom. .of the vessel. Howeven insuch a process it is necconductor application the polyethylene terephthalate must be thermally resistant up to a temperature of at least about 100C. Only a polyethylene terephthalate coating which has a considerable crystalline character can meet this particular requirement. These polyethylene terephthalate coatings of the prior art have been applied by what may be referred to as the in-case or tube-on method.
  • Such polyethylene terephthalate coated products have a number of disadvantages resulting from the fact that the crystalline structure of the coating does not impart enough toughness and hardness to be able to obtain suitable products for certain applications such as the manufacture of barbed wire, wire mesh, wire netting, wire fences and the like.
  • the present invention relates to an improved process for manufacturing plastic coated wire which comprises heating the wire to be coated to an elevated temperature, passing the heated wire through an extrusion zone maintained at an elevated temperature and pressure in which a polyester plastic in molten condition is coated on the heated-wire, and cooling the plastic coated wire at a rate sufficient to maintain the plastic in the amorphous state.
  • a steel wire is coated with polyethylene terephthalate in which the coating is at least 80 percent amorphous and 0.1 to 0.3 mm in thickness.
  • An improved wire product is produced which may be advantageously utilized for the manufacture of barbed wire, wire mesh, wire netting, wire fences and the like.
  • FIG. 1 is a schematic cross-section of an extrusion head for the application of the tube-on method for coating wires and,
  • FIG. 2 is a schematic cross-section of an extrusion head for the application of the pressure method for coating wire.
  • FIG. 1 illustrates an apparatus and method for applying a plastic coating such as polyethylene terephthalate to a wire utilizing .the ftube-on method.
  • a tube-formed layer 5 of polyethylene terephthalate 6 is formed first and afterwards it is drawn outside the extrusion head 7 on to the wire 8.
  • the speed of the wire 8 should be higher than the speed of the coating 5 coming out of the extrusion head 7.
  • One of the problems of this particular process is that in many spots between the wire surface and the polyethylene terephthalate there are air bubbles formed which results in substantially reducing the adhesion of the wire to the plastic.
  • FIG. 2 The pressure" method of producing a plastic coated wire in accordance with the present invention is illustrated in FIG. 2.
  • a heated wire I is passed through extrusion head 2 in which molten plastic 3 at an elevated temperature is extruded under pressure to form a coating 4 on wire 1 to thereby produce coated wire 10.
  • the wire I may be heated by any conventional technique such as by electrical heating, heating with steam in a heating chamber, induction heating and the like.
  • Wire 1 may be continuously passed from a storage spool to the heater and then to the extrusion head 2 of the extrusion machine. In such a continuous operation the preheating of the moving wire is carried out on a continuous basis.
  • the wire it is preferred to preheat the wire between 100 to 200C, preferably between 130 and 170C, and more preferably between 150 and 170C so as to considerably decrease the internal stresses in the product coating.
  • the preheating also removes humidity and lubricants from the wire surface.
  • the extrusion'head 2 includes a discharge nozzle or mouth piece through which the coated wire 10 is discharged.
  • extrusion head 2 At its other end extrusion head 2 is provided with a conical cavity in which is disposed a conical surface-shaped rotation-symmetrical wedge for the passage of the molten plastic such as polyethylene terephthalate.
  • the molten plastic 3 is heated to a molten state in the range of 200 to. 300C, preferably 250 to 270C and fed by conventional techniques into extrusion head 2. More particularly, the plastic in the form of grains may be passed through a funnel into the grooves of an Archimedes screw, revolving in a heated cylinder. By this means the plastic may be passed to the extrusion head 2, while it becomes more and more plastically deformable.
  • the heating elements are arranged in such a way as to effect a systematic temperature control on the plastic.
  • the screw is constructed in such a way that the plastic is pushed forward while at the same time the plastic is being increasingly compressed.
  • the thickness of the applied coatings of plastic to the wire may be regulated by utilizing extrusion heads of different sizes as well as by controlling the pressure produced by the Archimedes screw.
  • the coated wire 10 After passing out of the extrusion head 2, the coated wire 10 is cooled down at a rapid rate such that the applied plastic coating on the wire is primarily amorphous.
  • the coated wirell is preferably immediately passed into .
  • a cooling liquid such as cold water to quench the coated wire 10.
  • the cooling rate will depend in parton the relation of the wire diameter to the coating thickness as well as to the temperature of the cooling medium. Thus the thicker the diameter of the coated wire the lower the temperature of the cooling medium should be. Normally, however, for the purposes of the present invention quenching the heated coated wire in'a bath of cold water will be sufficient to accomplish the necessary quenching.
  • the coated plastic wire is cooled down by chilling it in sufficiently cold water to obtain a plastic coated steel wire of which the coating is preferably at least percent amorphous and has a thickness in the range of about 0.1 to 0.3 mm.
  • the cooling vessel should be long enough so that when the wire flows out of the cooling vessel the temperature of the coating should be sufficiently low (preferably below about 155C) to enable it to be coiled up without damaging the coated wire.
  • the present invention is particularly advantageously used for coating steel wire of the type utilized in the manufacture of barbed wire, wire mesh, wire netting, wire fences and the like.
  • the plastic coating prevents corrosion of the steel wire when exposed to the atmosphere or other corrosive media.
  • the present invention is also applicable to the coating of other metal wires, such as, for example, copper wire, aluminum wire and the like.
  • the present invention is particularly applicable to metal wires having a diameter greater than 1 mm.
  • polyester plastic coatings which are polymers of dicarboxylic acids and glycols.
  • isophthalic acid may be utilized instead of terephthalic acid and other glycols may be utilized other than ethylene glycol.
  • mixtures of polymers of different dicarboxylic acids and glycols may be utilized as well as mixtures of such polyesters with other plastic materials.
  • a bright steel wire with a diameter of 1.8 mm was preheated up to C and was drawn through an extrusion head of the type shown in FIG. 2 at a speed of 150 meters per minute.
  • the diameter of the extrusion cylinder was 45 mm while the length to diameterratio was 26.
  • the temperature of the cylinder was maintained at its inlet end at 230C, in its middle at 310C, and at the feed end (just before the extrusion head) at 300C.
  • the extrusion head itself which was fed by the screw was also maintained at a temperature of 300C.
  • the screw which was not cooled had a compression ratio of 3.5 (that is the ratio between the pressure at the extrusion head and the pressure at the feed end).
  • Polyethylene terephthalate in the form of grains was introduced into the extrusion cylinder and had a temperature of 260C when leaving the extrusion machine.
  • the coated wire was passed through air for a length of 1 meter and then for a length of 4 meters through a ves-' sel containing water at ambient temperature so that the coating was veryrapidly brought down below C. It was found that this was necessary in order to maintain the plastic in primarily the amorphous state.
  • the resul' tant coating which had a thickness of 0.1 mm exhibited a substantial degree of toughness. Also after repeated flexions of the wire the coating was not damaged.
  • the coated wire obtained by the process of the present invention (particularly wire coated with amorphous polyethylene terephthalate) is especially well adapted for many industrial applications.
  • the main properties of the coating are l a higher hardness than the polyvinyl chloride coatings of the prior art, (2) a high degree of flexibility, (3) resistance to water absorption, (4) better mechanical properties, such as a higher modulus of elasticity, and (5) a particularly excellent adhesion of the coating to thewire surface. Due to these outstanding properties it has now been found possible to use coating with thicknesses of 0.1 to 0.2 mm for major industrial applications such as barbed wire, wire fences, wire mesh, and wire netting. Further, it has been found that such coated wire can be successfully processed in conventional wire product manufacturing machines.
  • Coated wires of the present invention also demonstrate increased resistance to corrosion and formation of rust during the lifetime of the products. As the adhesion is' much better and as the water absorption is smaller the possibility of formation of rust is practically excluded. The formation of rust which takes place between the coating and the metal surface is one of the main causes of the peeling of the wire coating during its lifetime. This has been especially true in the case of thin (01 to 0.2 mm) polyvinyl chloride coatings.
  • the polyethylene terephthalate coated wire product of the present invention having a coating thickness of only about 0.1 to 0.2 mm has been found to be as good as relatively thick polyvinyl chloride coatings of 0.4 to 0.5 mm for the production of such products as barbed wire, wire fences, wire mesh, wire netting and similar products manufactured from wire.
  • the manufacturing cost of the coated wires of the present invention is considerably cheaper than the aforementioned polyvinyl chloride coatings since a substantially lesser amount of the expensive plastic coating material is required.
  • An improved process for manufacturing polyethylene terephthalate coated wire for use in the manufacture of barbed wire, wire netting, wire fence and the like which comprises preheating a wire to be coated to a temperature in the range of about to 200C, said wire having a diameter greater than 1 mm.
  • an extrusion head which includes a nozzle through which said polyethylene terephthalate coated wire is withdrawn and a conical wedge provided with a central bore disposed within a corresponding cavity at the other end of said head, said extrusion head being adapted to feed said wire through said central bore and molten polyethylene terephthalate through a conical passageway defined by the outer surface of said wedge and the interior conical surface of said head at said other end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Electromechanical Clocks (AREA)
US00336799A 1970-01-29 1973-02-28 Process for manufacturing polyethylene terephthalate plastic coated wire Expired - Lifetime US3829545A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
NL7001315A NL7001315A (es) 1970-01-29 1970-01-29
BE761408A BE761408A (nl) 1970-01-29 1971-01-11 Werkwijze voor het vervaardigen van een door extrusie met het polyethyleentereftalaat beklede staaldraad, alsmede met het polyethyleentereftalaat beklede staaldraad en daaruit gevormde voortbrengselen
CA103,295A CA956426A (en) 1970-01-29 1971-01-21 Process for the manufacture of a steel wire coated by extrusion with polyethylene terephthalate
SE00708/71A SE368170B (es) 1970-01-29 1971-01-21
FR7102230A FR2077389B1 (es) 1970-01-29 1971-01-22
LU62500D LU62500A1 (es) 1970-01-29 1971-01-27
AT72271*#A AT326899B (de) 1970-01-29 1971-01-28 Verfahren zum aufbringen eines uberzuges aus polyathylenterephthalat auf einen stahldraht
DK37171A DK146236C (da) 1970-01-29 1971-01-28 Polyethylenterephthalat-overtrukket staaltraad og fremgangsmaade til fremstilling deraf
CH131871A CH530261A (fr) 1970-01-29 1971-01-28 Procédé pour la fabrication d'un fil d'acier revêtu de téréphtalate de polyéthylène par extrusion, fil d'acier obtenu par ce procédé et utilsation de ce fil
DE2104271A DE2104271C3 (de) 1970-01-29 1971-01-29 Verfahren zum kontinuierlichen Ummanteln von Stahldraht
BR000701/71A BR7100701D0 (pt) 1970-01-29 1971-01-29 Processo para fabricacao de um arame de aco bem como arame de aco obtido atraves do mesmo
GB2065771A GB1322114A (en) 1970-01-29 1971-04-19 Coating process
US00336799A US3829545A (en) 1970-01-29 1973-02-28 Process for manufacturing polyethylene terephthalate plastic coated wire

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL7001315A NL7001315A (es) 1970-01-29 1970-01-29
US10835571A 1971-01-21 1971-01-21
US00336799A US3829545A (en) 1970-01-29 1973-02-28 Process for manufacturing polyethylene terephthalate plastic coated wire

Publications (1)

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US3829545A true US3829545A (en) 1974-08-13

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US00336799A Expired - Lifetime US3829545A (en) 1970-01-29 1973-02-28 Process for manufacturing polyethylene terephthalate plastic coated wire

Country Status (13)

Country Link
US (1) US3829545A (es)
AT (1) AT326899B (es)
BE (1) BE761408A (es)
BR (1) BR7100701D0 (es)
CA (1) CA956426A (es)
CH (1) CH530261A (es)
DE (1) DE2104271C3 (es)
DK (1) DK146236C (es)
FR (1) FR2077389B1 (es)
GB (1) GB1322114A (es)
LU (1) LU62500A1 (es)
NL (1) NL7001315A (es)
SE (1) SE368170B (es)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893642A (en) * 1970-01-29 1975-07-08 Bekaert Sa Nv Polyethylene terephthalate plastic coated wire
DE2638763A1 (de) * 1976-07-01 1978-01-05 Maillefer Sa Verfahren zur herstellung von wickeldraehten durch extrusion von thermoplasten
US4332855A (en) * 1978-04-14 1982-06-01 Raychem Corporation Polymeric compositions
JPS58212941A (ja) * 1982-06-07 1983-12-10 渡瀬　秀夫 熱可塑性合成樹脂被覆金属線
US4426339A (en) 1976-12-13 1984-01-17 Raychem Corporation Method of making electrical devices comprising conductive polymer compositions
US4540737A (en) * 1983-02-07 1985-09-10 Celanese Corporation Method for the formation of composite articles comprised of thermotropic liquid crystalline polymers and articles produced thereby
US4541979A (en) * 1981-12-22 1985-09-17 Bicc Plc Process and apparatus for manufacturing optical cable elements
US4588546A (en) * 1984-08-27 1986-05-13 The Goodyear Tire & Rubber Company Wire coating process
US4764664A (en) * 1976-12-13 1988-08-16 Raychem Corporation Electrical devices comprising conductive polymer compositions
US4866253A (en) * 1976-12-13 1989-09-12 Raychem Corporation Electrical devices comprising conductive polymer compositions
US4876440A (en) * 1976-12-13 1989-10-24 Raychem Corporation Electrical devices comprising conductive polymer compositions
US5111032A (en) * 1989-03-13 1992-05-05 Raychem Corporation Method of making an electrical device comprising a conductive polymer
US5890289A (en) * 1991-12-26 1999-04-06 Bay Mills Limited Method of making an insulating spacer for spacing apart panes of a multiple pane unit
US5911932A (en) * 1997-07-09 1999-06-15 R. Charles Balmer Method of prepregging with resin
WO2000036177A1 (en) * 1998-12-15 2000-06-22 N.V. Bekaert S.A. Steel wire with bright looking surface
CN101296765B (zh) * 2005-11-22 2011-08-17 贝卡尔特股份有限公司 具有厚聚合物覆层的钢丝

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9010182D0 (en) * 1990-05-04 1990-06-27 Powersafe Cables Ltd A process for coating elongate articles
DE202011101115U1 (de) 2011-05-26 2011-07-14 Bts Bau Technische Systeme Gmbh & Co. Kg Dübel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511986A (en) * 1948-04-30 1950-06-20 Western Electric Co Apparatus for extruding organic plastic material

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893642A (en) * 1970-01-29 1975-07-08 Bekaert Sa Nv Polyethylene terephthalate plastic coated wire
DE2638763A1 (de) * 1976-07-01 1978-01-05 Maillefer Sa Verfahren zur herstellung von wickeldraehten durch extrusion von thermoplasten
US4145474A (en) * 1976-07-01 1979-03-20 Maillefer S.A. Method of manufacturing insulated electric wire of the enamelled-wire type by extrusion
US4426339A (en) 1976-12-13 1984-01-17 Raychem Corporation Method of making electrical devices comprising conductive polymer compositions
US4876440A (en) * 1976-12-13 1989-10-24 Raychem Corporation Electrical devices comprising conductive polymer compositions
US4764664A (en) * 1976-12-13 1988-08-16 Raychem Corporation Electrical devices comprising conductive polymer compositions
US4866253A (en) * 1976-12-13 1989-09-12 Raychem Corporation Electrical devices comprising conductive polymer compositions
US4332855A (en) * 1978-04-14 1982-06-01 Raychem Corporation Polymeric compositions
US4541979A (en) * 1981-12-22 1985-09-17 Bicc Plc Process and apparatus for manufacturing optical cable elements
JPH0144503B2 (es) * 1982-06-07 1989-09-28 Hideo Watase
JPS58212941A (ja) * 1982-06-07 1983-12-10 渡瀬　秀夫 熱可塑性合成樹脂被覆金属線
US4540737A (en) * 1983-02-07 1985-09-10 Celanese Corporation Method for the formation of composite articles comprised of thermotropic liquid crystalline polymers and articles produced thereby
US4588546A (en) * 1984-08-27 1986-05-13 The Goodyear Tire & Rubber Company Wire coating process
US5111032A (en) * 1989-03-13 1992-05-05 Raychem Corporation Method of making an electrical device comprising a conductive polymer
US5300760A (en) * 1989-03-13 1994-04-05 Raychem Corporation Method of making an electrical device comprising a conductive polymer
US5890289A (en) * 1991-12-26 1999-04-06 Bay Mills Limited Method of making an insulating spacer for spacing apart panes of a multiple pane unit
US6524690B1 (en) 1997-07-09 2003-02-25 Joel A. Dyksterhouse Method of prepregging with resin and novel prepregs produced by such method
US5911932A (en) * 1997-07-09 1999-06-15 R. Charles Balmer Method of prepregging with resin
US6656316B1 (en) 1997-07-09 2003-12-02 Joel A. Dyksterhouse Method of prepregging with resin and novel prepregs produced by such method
US6709995B1 (en) 1997-07-09 2004-03-23 Joel A. Dyksterhouse Method of prepregging with resin and novel prepregs produced by such method
US7297740B2 (en) 1997-07-09 2007-11-20 Polycomp, Inc. Method of prepregging with resin and novel prepregs produced by such method
WO2000036177A1 (en) * 1998-12-15 2000-06-22 N.V. Bekaert S.A. Steel wire with bright looking surface
EP1380402A2 (en) * 1998-12-15 2004-01-14 N.V. Bekaert S.A. Steel wire with bright looking surface
EP1380402A3 (en) * 1998-12-15 2004-03-03 N.V. Bekaert S.A. Steel wire with bright looking surface
CN1329550C (zh) * 1998-12-15 2007-08-01 贝卡尔特股份有限公司 具有光亮外观的表面的钢丝
CN101296765B (zh) * 2005-11-22 2011-08-17 贝卡尔特股份有限公司 具有厚聚合物覆层的钢丝

Also Published As

Publication number Publication date
CA956426A (en) 1974-10-22
AT326899B (de) 1976-01-12
NL7001315A (es) 1971-08-02
SE368170B (es) 1974-06-24
DE2104271B2 (de) 1979-05-10
FR2077389B1 (es) 1973-12-28
LU62500A1 (es) 1971-08-11
GB1322114A (en) 1973-07-04
CH530261A (fr) 1972-11-15
DE2104271A1 (de) 1971-08-05
FR2077389A1 (es) 1971-10-22
BE761408A (nl) 1971-06-16
ATA72271A (de) 1975-03-15
DK146236C (da) 1984-02-06
BR7100701D0 (pt) 1973-05-10
DE2104271C3 (de) 1980-01-17
DK146236B (da) 1983-08-08

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